I've been consuming English media for many years. My computer and phone have used English since the 90s. I got used to it, so today, even if I could switch my phone to my native language, I don't, it sounds strange.
These days I consume most media in English (US, UK, AU) - movies, tv shows, YouTube, websites, books (paper, audiobooks). I have no trouble understanding content, but I do keep subtitles on out of habit, and that helps when there's a stronger accent.
I've been using English at work exclusively for more than 10 years, and where I live now, I hang out with an international crowd. We speak English to each other, even though it's not anyone's first language most of the time.
I take notes and journal in English, even privately. I sometimes even think in English.
I still have an accent and I'm missing some vocabulary and the occasional grammatical rule, but I consider myself fluent in English.
You can use DNS01 for services not accessible from the outside. I use a caddy reverse proxy, with a wildcard cert for *.mydomain.com. caddy handles that for me automagically. Needed? Maybe not, but it's a whole lot prettier, and I learned new things about certs and caddy :)